Could you recount the story Baba told about the man who forgot his vow and how it related to the Dakshina he was asked for?

Sai Baba shared a story in Chapter 36 to explain his reasoning for asking for a specific amount of Dakshina. He spoke of a man who was initially poor and, upon being offered a job for fifteen rupees, made a vow to give his first month's salary to God. However, the man later forgot this promise. His salary grew from fifteen to thirty, then sixty, and eventually seven hundred rupees. As his wealth increased, his forgetfulness grew stronger. Baba explained that the man's past deeds brought him to Shirdi, where Baba, under the pretext of asking for Dakshina, requested the original fifteen rupees to help the man finally fulfill his vow and become free from his long-standing debt.